TP-LINK EX820v Router - limited address reservation

Have fallen into an annoying limitation on the Yayzi supplied router.

If I try to allocate more then 32 reserved LAN IP addresses it fails with:

ErrorCode9812

This limit seems an incredibly low limit as I have a lot more than 32 mac addresses on my LAN.

While I can set individual devices to not use DHCP and fix their addresses manually, this is a real pain migrating to this router.

I supose another option is to switch off DHCP on the EX820v and re-enable DHCP on my old router (which has no such limitation on the MAC to IP mapping).

Any thoughts?

UPDATE:
Just come across

Not my precise router, but it exatly the same issue.

Looks like tp-link need to up their game :frowning: